A catch-all e-mailbox is one that gathers all the messages sent to non-existent addresses. For example, if your email address is email@example.com, but somebody misspells it and sends an email message to firstname.lastname@example.org, it will still be received in the catch-all mailbox that you have set up. Just one single mailbox per domain can have this feature enabled and thus you’ll never miss emails because the other side has an outdated email address or has made a typo. The negative aspect of having a catch-all mailbox is that you may start receiving plenty of unsolicited email messages, but this issue can be solved by using anti-spam filtering software. It is also crucial to remember that a mailbox with an active catch-all feature cannot redirect incoming email messages to a 3rd-party mailbox.